diff --git a/chapter06/man-db.xml b/chapter06/man-db.xml
index 503c9c07a..9ebe6caef 100644
--- a/chapter06/man-db.xml
+++ b/chapter06/man-db.xml
@@ -91,6 +91,10 @@
 
 <screen><userinput remap="install">make install</userinput></screen>
 
+    <para>Remove a reference to a non-existent user:</para>
+
+<screen><userinput remap="install">sed -i "s:man root:root root:g" /usr/lib/tmpfiles.d/man-db.conf</userinput></screen>
+
   </sect2>
 
   <sect2>